The latest drone in DJI's popular Phantom series can track humans and dodge obstacles. The enhancements make the Phantom 4 one of the most advanced consumer drones on the market, and further lower the barrier to flight for most consumers. But the technology comes with a sizable price tag.

When it comes to robots, humans are perhaps a little too trusting. In a series of experiments at Georgia Tech that simulated a building fire, people ignored emergency exit signs and followed instructions from a guidance robot—even after being told the robot was faulty.

If you haven't been paying much attention to virtual reality, now might be a good time to start. In a series of announcements at Mobile World Congress in Barcelona this week, some of the biggest names in smartphones, consumer electronics and social media have given the technology a major boost.

One of the most fun smartphone accessories to come out of this year's Mobile World Congress expo has to be LG's Rolling Bot. It's a spherical ball that rolls around on command from a smartphone, and includes a camera and laser pointer.

The U.S. Army is exploring the use of drones to deliver supplies to soldiers on the battlefield, a potentially game-changing use for an emerging technology that until now has been mostly identified with the future delivery of household items.